package com.mayikt;

/**
 * @ClassName Test037
 * @Author 蚂蚁课堂余胜军 QQ644064779 www.mayikt.com
 * @Version V1.0
 **/
public class Test037 {
    public static void main(String[] args) {
        int sum = 0;
        for (int i = 1; i <= 400; i++) {
            sum += i;
        }
        System.out.println(sum);
    }
}
